Cheap flights from Incheon Intl Airport to Illinois from $399
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to Illinois departing on 5/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Incheon Intl Airport to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Air Canada flights from Incheon Intl Airport to Illinois
Our best Air Canada deals on Incheon Intl Airport to Illinois flight tickets
LOT flights from Incheon Intl Airport to Illinois
Our best LOT deals on Incheon Intl Airport to Illinois flight tickets
See travel insights to Illinois from
How to get the cheapest flight ticket from Incheon Intl Airport to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Incheon Intl Airport is in March. Flight prices, which tend to average around $990, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of March, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $1,172.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Incheon Intl Airport to Illinois is on a Monday when prices can be found for as low as $1,294. Flights from Incheon Intl Airport to Illinois on a Saturday will generally be more expensive and average around $1,645. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Incheon Intl Airport to Illinois during this time can be as low as $1,098. Flights in the evening are often more expensive with an average ticket price of $1,995.
What is the cheapest Incheon Intl to Illinois flight route?
Fly from Incheon Intl to Chicago O'Hare Intl for the best Incheon Intl - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Incheon Intl Airport when booking 10 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,294 when searching 10 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Incheon Intl Airport for as low as $998 on momondo.
What cabin class options are available on Incheon Intl to Illinois flights?
There are 2 cabin classes available to choose from on Incheon Intl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Incheon Intl to Illinois?
Korean Air, American Airlines, and EVA Air are the most popular carriers operating from Incheon Intl to Illinois
What airlines fly to Illinois?
Korean Air, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Incheon Intl Airport according to our data. Korean Air is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Incheon Intl Airport to Illinois on average per day?
2 flights are operational daily from Incheon Intl Airport to Illinois as of May 2025. The most popular departure time for this route is 10:00AM, with 100% of flights per day taking off at noon.
How many flights depart from Incheon Intl Airport to Illinois on average per week?
As of May 2025, 14 flights take off from Incheon Intl Airport and land in Illinois each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
Cheap Incheon Intl Airport to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Incheon Intl Airport to Illinois
When did momondo last update prices for flights from Incheon Intl Airport to Illinois?
Prices for flights from Incheon Intl Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Incheon Intl Airport to Illinois?
There are 6 operators available for flights from Incheon Intl Airport to Illinois as of May 2025.
How old do you have to be to fly from Incheon Intl Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Incheon Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Incheon Intl Airport to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Incheon Intl Airport to Illinois is Boeing 777-300ER (87.56% of total bookings). The next most popular plane models are Airbus A350-900 (6.99%), Airbus A380-800 (2.07%), and Boeing 787-9 Dreamliner (1.81%).
Best airlines flying from Incheon Intl Airport to Illinois
Compare and see reviews for airlines that fly from Incheon Intl Airport to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $229 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 8.2 442 reviews | |||
| PriceFrom $697 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $730 | Free Cancellation | Rating 7.0 9,328 reviews | |||
| PriceFrom $959 | Free Cancellation | Rating 7.4 8,724 reviews | |||
| PriceFrom $1,153 | Free Cancellation | Rating 8.4 1,072 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seoul to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seoul to Illinois. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seoul to Illinois with flexible booking policies on momondo?
momondo does allow users to show only those flights to Illinois from Seoul which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Seoul to Illinois?
Once all potential Seoul to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Seoul to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Seoul. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.